I could see this working in conjunction with a junk variable remover... but since I'm in my ScriptEd most of the time anyway, it's just a click away to get the variables. Plus, the top-right button in the variables tab sorts variables, too.

However, the idea of bringing it to a dialog gives newer people an easier interface for creation and removal of variables.

If you could find a place to add a refresh button, that would also be pretty neat, so people who are testing their scripts could watch what their variables are doing.

Also, why EXACTLY does clicking on the list anywhere CLEAR ALL OF YOUR VARIABLES!? I think that would be meant for the "Clear" button, but you put it under 5.

dialog vareditor {
  title "Variable Editor"
  size -1 -1 180 140
  option dbu
  edit "", 1, 10 5 162 10, autohs
  button "Set", 2, 20 20 32 12, disable
  button "Unset", 3, 75 20 32 12, disable
  button "Refresh", 4, 130 20 32 12
  list 5, 10 45 160 90
  text "Current Variables:", 6, 12 35 45 8
}
on 1:dialog:vareditor:*:*:{
  if ($devent == init) vareditor_populate
  if ($devent == edit) && ($did == 1) did -e $dname 2,3
  if ($devent == sclick) {
    if ($did == 2) {
      set $did(1) $$?"What does $did(1) stand for?"
      did -a $dname 5 $did(1) = $eval($did(1),2)
      did -r  $dname 1
      did -b $dname 2,3
    }
    if ($did == 3) {
      unset $did(1)
      did -d $dname 5 $did(5).sel
      did -r $dname 1
      did -b $dname 2,3
    }
    if ($did == 4) {
      did -r $dname 5
      vareditor_populate
    }
    if ($did == 5) {
      did -r $dname 1
      did -a $dname 1 $did(5).seltext
      did -e $dname 2,3
    }
  }
}
alias vareditor_populate {
  var %x 1
  var %y 1
  while ($var(%*,%y)) {
    var %vars $addtok(%vars,$var(%*,%y),32)
    inc %y
  }
  while ($gettok(%vars,%x,32)) {
    did -a $dname 5 $gettok(%vars,%x,32) = $eval($gettok(%vars,%x,32),2)
    inc %x
  }
}

menu * {
  Variable Editor:dialog $iif($dialog(vareditor),-v,-m) vareditor vareditor
}

Here is a version where I removed the unset %*, and replaced the clear command (since you could just /unset all at any time) with a Refresh Command.